" Test len function with different types

" Test len with string
let s = "hello"
echo "len('hello') = " . len(s)

" Test len with list
let l = [1, 2, 3, 4, 5]
echo "len([1, 2, 3, 4, 5]) = " . len(l)

" Test len with dict
let d = {'a': 1, 'b': 2, 'c': 3}
echo "len({'a': 1, 'b': 2, 'c': 3}) = " . len(d)